/**
 * @fileoverview Utilities for estimating token usage and costs for code reviews.
 *
 * This module provides functions for estimating token usage and costs for code reviews
 * based on file content and model selection. It uses the tokenCounter utilities for
 * basic token counting and cost calculation, and adds specialized functions for
 * estimating review-specific token usage patterns.
 */
import { FileInfo } from '../types/review';
/**
 * Estimate the number of output tokens based on input tokens and review type
 * @param inputTokens Number of input tokens
 * @param reviewType Type of review
 * @returns Estimated number of output tokens
 */
export declare function estimateOutputTokens(inputTokens: number, reviewType: string): number;
/**
 * Estimate token usage and cost for a set of files
 *
 * This function calculates the estimated token usage and cost for reviewing a set of files
 * using a specified AI model. It considers:
 * - The content of each file (code, comments, etc.)
 * - The type of review being performed (quick, security, architectural, etc.)
 * - The specific AI model being used and its pricing structure
 *
 * The estimation includes overhead tokens for system prompts and instructions that are
 * included in every review, in addition to the tokens from the file content itself.
 *
 * @param files Array of file information objects containing file content and metadata
 * @param reviewType Type of review (quick, security, architectural, performance)
 * @param modelName Name of the model to use (e.g., 'gemini:gemini-1.5-pro')
 * @returns Estimated token usage and cost information including:
 *   - inputTokens: Number of tokens in the input (files + prompts)
 *   - outputTokens: Estimated number of tokens in the AI response
 *   - totalTokens: Total token usage (input + output)
 *   - estimatedCost: Estimated cost in USD
 *   - formattedCost: Cost formatted as a string (e.g., '$0.12 USD')
 *   - fileCount: Number of files being reviewed
 *   - totalFileSize: Total size of all files in bytes
 */
export declare function estimateReviewCost(files: FileInfo[], reviewType: string, modelName?: string): Promise<{
    inputTokens: number;
    outputTokens: number;
    totalTokens: number;
    estimatedCost: number;
    formattedCost: string;
    fileCount: number;
    totalFileSize: number;
}>;
/**
 * Format estimation results as a human-readable string
 *
 * This function takes the estimation results from estimateReviewCost or estimateFromFilePaths
 * and formats them into a user-friendly string that can be displayed to the user.
 *
 * The formatted string includes:
 * - Number of files being reviewed
 * - Total file size
 * - Input token count
 * - Estimated output token count
 * - Total token usage
 * - Estimated cost in USD
 *
 * @param estimation Estimation results from estimateReviewCost or estimateFromFilePaths
 * @param reviewType Type of review (quick, security, architectural, performance)
 * @param modelName Name of the model being used
 * @returns Formatted estimation string ready for display
 * @example
 * // Example output:
 * // Estimation for 5 files (25.5 KB) using gemini-1.5-pro:
 * // - Review type: quick
 * // - Input tokens: 5,000
 * // - Output tokens: 2,500 (estimated)
 * // - Total tokens: 7,500
 * // - Estimated Cost: $0.015 USD
 */
export declare function formatEstimation(estimation: ReturnType<typeof estimateReviewCost> extends Promise<infer T> ? T : never, reviewType: string, modelName: string): string;
/**
 * Estimate token usage and cost for a set of file paths
 *
 * This function is a convenience wrapper around estimateReviewCost that takes file paths
 * instead of FileInfo objects. It reads the content of each file and then calls
 * estimateReviewCost to calculate the token usage and cost.
 *
 * This is particularly useful for the --estimate command line flag, which needs to
 * estimate costs before actually performing a review.
 *
 * @param filePaths Array of file paths to estimate token usage for
 * @param reviewType Type of review (quick, security, architectural, performance)
 * @param modelName Name of the model to use (e.g., 'gemini:gemini-1.5-pro')
 * @returns Estimated token usage and cost information (same as estimateReviewCost)
 * @throws Error if any file cannot be read
 * @see estimateReviewCost for details on the return value
 */
export declare function estimateFromFilePaths(filePaths: string[], reviewType: string, modelName?: string): Promise<ReturnType<typeof estimateReviewCost> extends Promise<infer T> ? T : never>;
/**
 * Estimate token usage and cost for a multi-pass review
 *
 * This function extends the standard token estimation by accounting for the overhead
 * of multi-pass reviews, including context maintenance between passes and additional
 * overhead for each pass.
 *
 * @param files Array of file information objects containing file content and metadata
 * @param reviewType Type of review (quick, security, architectural, performance)
 * @param modelName Name of the model to use (e.g., 'gemini:gemini-1.5-pro')
 * @param options Additional estimation options
 * @param options.passCount Number of passes to estimate (if known)
 * @param options.contextMaintenanceFactor Factor for context maintenance overhead (0-1)
 * @returns Estimated token usage and cost information for multi-pass review
 */
export declare function estimateMultiPassReviewCost(files: FileInfo[], reviewType: string, modelName?: string, options?: {
    passCount?: number;
    contextMaintenanceFactor?: number;
}): Promise<{
    inputTokens: number;
    outputTokens: number;
    totalTokens: number;
    estimatedCost: number;
    formattedCost: string;
    fileCount: number;
    totalFileSize: number;
    passCount: number;
    perPassCosts: {
        passNumber: number;
        inputTokens: number;
        outputTokens: number;
        totalTokens: number;
        estimatedCost: number;
    }[];
}>;
/**
 * Format multi-pass estimation results as a human-readable string
 *
 * @param estimation Multi-pass estimation results
 * @param reviewType Type of review
 * @param modelName Name of the model being used
 * @returns Formatted estimation string
 */
export declare function formatMultiPassEstimation(estimation: ReturnType<typeof estimateMultiPassReviewCost> extends Promise<infer T> ? T : never, reviewType: string, modelName: string): string;